Belt clamp and tightener



(No Model.)

J. T. PERTIG.

BELT CLAMP AND TIGHTBNER.

No. 324,546. Patented u 18, 1885. Q .5 k

N. PETERS, PholoLilhogmpher. Washmgmn. n. c

UNITED STATES arrest Ormcn.

JOHN T. FERTIG, OF DENVER, COLORADO.

BELT CLAMP AND TIGHTENER.

SPECIFICATION forming part of Letters Patent No. 324,546, dated August 18, 1885.

(No model.)

To all whom it may concern: 2' is a pawl attached to the hub of each cog- Be it known that I, JOHN T. FERTIG, a citiwheel h, as shown in Figs. 2 and 3, said pawl zen of the United States, residing at Denver, being received by the notches b in the guide in the county of Arapahoe and State of 0010- rod B.

5 rado, have invented a new and useful Imj is a square shaft passing through thehubs provement in Belt-Tighteners, of which the. of the cog-wheels hand extending sufficiently following is a specification, reference being on either side of the machine to allow attachhad therein to the accompanying drawings. ment of the crank m. The shaft j is remov- My invention relates to improvements in ableatpleasure,beingofthesamesizethrough- 1o beltt-ighteners, being an improvement on an out. invention described and claimed in an appli- The outside of the upright part a consists cation filed by me in the United States latof a plate, of, which is attached by screws, ent Office on the 5th day of January, A. D. and must be removed when the cog-wheel h 1885, said application having been allowed is put into its place or removed therefrom.

15 on the 26th day of the same month, the Let- Z is a pawl attached to the top of each upters Patent to bear date February 24, A. D. right part a, the pivotal extremity of the 1885, No. 312,989. pawl being received in a suitable socket, as

The object of my improvement is to proshown in Fig. 2, the other extremity dropvide a belt-tightener which shall be complete, ping into a notch in the upper. edge of the 20 simple, durable, and cheap, and at the same guide-rod B. time superior to other similar inventions now In operating my improved invention the 4 in use. I attain this object by dispensingwith sliding block A is placed on one side of the the chain-fall mentioned in my former applibeltjoining and the block A on the other cation and applying the power by means of side, as shown in Fig. 2, the belt D resting 25 a crank attached to a shaft which turns two on the bed of the blocks between the upright 7 5 cog-wheels, one on each end of said shaft, and parts a a and aa. The eccentric rollers O 0, working within the upright parts of one of having been covered with sand-paper or other the sliding blocks, the cogs of said wheels suitable material to increase the frictionwhen workingin corresponding notches ofthe guidein contact with the belt, are then placed 30 rods. 1' dispense with the springs and catches within the said blocks and turned toward each attached to the sides of the upright parts of other until their surface is brought in contact the blocks, said catches working in notches with the belt. The guide-rods B B are then in the sides of the guide-rods, as described slipped into the blocks A and A through the and shown in my former application, and openings in the upright parts a a and a a.

a5 substitute therefor pawls working in notches The shaft j is then slipped into position, as formed in the upper edges of the guide'rods. shown in the drawings, and the crank m at- Figure 1 is a side view of my improved tached to either end thereof. By turning the invention. Fig. 2 is a top view of the same, crank mthe cog-wheels,working in the notches showing the crank. Fig. 3 is a sectional view of the guide-rods, move the rods through the +0 on the line 00 :r, Fig. 1, of an upright part,with upright parts a a, the crank being turned so 0 the eog-wheel working therein. as to draw theblock A,moving with the guide- Similar letters refer to similar parts in the rods,toward the block A. The pawls i i,dropseveral views. ping into the notches of the guide-rods, hold In Fig. 1, a is an upright partof the block A. said rods in place when the belt is stretched 5 h is a cog-wheel working in the notches b to the proper tension. The eccentric rollers 5 of the guide-rod B. This cog-wheel is supbeing covered with sand-paper, as aforesaid, ported in the upright a by the portions of when pressed down lightly,the friction is sufits hub marked h h, Fig. 3, which form jourficient toprevent the rollers from slipping on nals received in corresponding journal-boxes the belt under all possible circumstances.

50 in the upright part a, as shown in Fig. 3.

I do not now claim, broadly, the eccentric 10o rollers O O, the guide-rodsBB, and the blocks with notches, as shown, and the eccentric 10 A and A, having claimed similar elements in rollers G C, with a covering, substantially as my former application; but 7 described ani sho .vn, and for the purpose set What I do claim, and desire to secure by forth. 5 Letters Patent, 1s- JOHN FERTIG The combination, in a belt-tightener, of the block A,with the pawls Z Z, the block A,with In presence of the plate a, the cog-wheels h h, the pawls M, H. H. McDERMorT, the shaft j, the crank m, the guide-rods B B, T. J. HANKS. 

